| Also known as | E8191 |
| Diagram | Fig. 5 — FRAME COMPLETE · ref 24 |
| Listed in parts books | 1968, 1970 |
Shakeproof washer
A shakeproof locking washer, PN 70-8191 (formerly E8191), used at frame and electrical fastener points to resist vibration loosening.
This is a shakeproof washer, catalog number 70-8191, also known under the earlier E8191 designation. It shows up in the frame and electrical equipment sections of the parts books, which tells us it was used to secure fasteners in more than one spot on the bike rather than being tied to one specific job.
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A shakeproof washer works by biting into the surfaces on either side of a fastener to keep it from working loose under vibration, which matters on a motorcycle frame and on electrical connections where a fastener backing out can cause a short or a loose ground. Since this one turns up across both the frame assembly and electrical equipment figures, it likely served as a general-purpose locking washer wherever the factory needed extra insurance against vibration.
Our catalog record ties this part to the 1968 through 1970 span but doesn't pin it to one exact location or one exact model. If you're chasing down a shakeproof washer for a specific fastener on your bike, give us a call and we'll help confirm it's the right one before you order.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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